US6860395B2 - System and adding hydraulic fluid to the balancing line of a jib of a level luffing crane - Google Patents

System and adding hydraulic fluid to the balancing line of a jib of a level luffing crane Download PDF

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Publication number
US6860395B2
US6860395B2 US10/397,387 US39738703A US6860395B2 US 6860395 B2 US6860395 B2 US 6860395B2 US 39738703 A US39738703 A US 39738703A US 6860395 B2 US6860395 B2 US 6860395B2
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hydraulic
hydraulic fluid
fluid transfer
main arm
double acting
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US20030192849A1 (en
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Antoine Gallego
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SERAM SA
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SMS Synergie Management Systeme
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples

Definitions

  • the present invention relates to devices for automatic balancing of the jib of a crane with articulated or telescopic arms as a function of the variation in the span of this jib, and more particularly such as an automatic balancing device with hydraulic control.
  • French Patent No. 82.19842 (2 536 733) describes an automatic hydraulic balancing device for the jib of a crane in which a hydraulic jack chamber controlling the movement of the auxiliary arm of the jib and a chamber of the hydraulic jack controlling the counterweight balancing beam are connected together in series, while the other chamber of each of the two jacks is selectively connected using a hydraulic distributor either to a hydraulic fluid supply source, or to a hydraulic fluid reservoir.
  • a hydraulic distributor either to a hydraulic fluid supply source, or to a hydraulic fluid reservoir.
  • the purpose of this invention is to correct this disadvantage and consequently it proposes a simple, reliable and inexpensive system for automatically or manually compensating this lack of synchronisation.
  • a jib of a level luffing crane with a hydraulic balancing device is of the type comprising a main arm installed free to rotate about a support turret, an auxiliary arm articulated at one end of the main arm and which tilts under the control of a first double acting hydraulic jack supported on the main arm and the rod of which is connected to the auxiliary arm, a counterweight articulated at the rear end of the main arm, a second double acting hydraulic jack supported on the main arm with its rod coupled to the counterweight, a hydraulic balancing pipe connecting the annular chambers of the said first and second jacks together, and a control device selectively connecting the full section chamber of the first or the second hydraulic jack to a hydraulic fluid supply source and the full section chamber of the other of the two said hydraulic jacks to a hydraulic fluid reservoir. It is characterised by a hydraulic fluid transfer line connecting the hydraulic fluid supply source to the hydraulic balancing pipe, a means for controlling the fluid input into the balancing pipe being provided on the said fluid
  • the fluid inlet control means is composed of a solenoid valve, and position detection means are placed firstly close to the articulated link between the main arm and the auxiliary arm, and secondly close to the articulated connection between the main arm and the counterweight. If a pendular position of the auxiliary arm is detected and a pendular position of the counterweight is not detected at the same time, these position detection means control activation of the solenoid valve through a logic controller in order to add hydraulic fluid to the balancing pipe.
  • the fluid inlet control means consists of a manual hydraulic valve or control valve.
  • a hydraulic fluid outlet pipe leading to a reservoir is connected to the balancing pipe close to each of the two hydraulic jacks, an evacuation control valve being placed on each said outlet pipe.
  • FIG. 1 is a side view of the jib of a crane with articulated arms and a hydraulic balancing device equipped with a system according to the invention for the automatic addition of fluid, the auxiliary arm being shown in the horizontal position;
  • FIG. 2 is a view similar to FIG. 1 , but with the auxiliary arm in the pendular position;
  • FIG. 3 is a side view of a jib of a crane with articulated arms and an automatic hydraulic balancing device, equipped with a system for manual input of fluid according to the invention.
  • FIGS. 1 and 2 show the jib of a crane with articulated arms equipped with a hydraulic automatic balancing system as described in French patent published as number 2 536 733.
  • the crane jib comprises a main arm 1 articulated to a turret 2 around a horizontal axis and which is tilted under the control of a jack 3 .
  • An auxiliary arm 4 is articulated at the front end of arm 1 , and a balancing beam 5 fitted with a counterweight 6 is articulated at its rear end.
  • a double acting hydraulic jack 7 is installed at the front end of the main arm 1 and its rod is attached to the auxiliary arm 4 .
  • a double acting hydraulic jack 8 is installed at the rear end of the main arm 1 , and its rod is attached to the balancing beam 5 .
  • the chamber of the jack 7 with an annular section is connected through a pipe 9 , called the balancing pipe, to the chamber with an annular section of hydraulic jack 8 , while the full section chambers of these two jacks are selectively connected through a hydraulic distributor 10 to a hydraulic fluid supply pump 11 and to a hydraulic fluid reservoir 12 .
  • a hydraulic line 13 connects the pump 11 to the balancing pipe 9 through a solenoid valve 14 and a non-return valve 15 .
  • the solenoid valve 14 is controlled through a logic controller 16 by mechanical, hydraulic, electric or electronic type detectors 17 , 18 installed on the auxiliary arm 4 and on the main arm 1 respectively.
  • Three control lights 19 , 20 and 21 installed in the logic controller 16 manage the state of the solenoid valve 14 , in other words a detection light 19 of the counterweight 6 that lights up when the detector 18 does not detect the presence of a counterweight and which goes off when the detector 18 detects the counterweight in the vertical position, a detection light 20 of the auxiliary arm 4 that goes off when the detector 17 detects the presence of the auxiliary arm and lights up when the auxiliary arm reaches its pendular position in which the detector 17 loses its detection and a light 21 showing activation of the solenoid valve 14 that comes on when the two lights 19 , 20 are on at the same time.
  • the detector 17 loses detection of the auxiliary arm 4 and the light 20 comes on, while at the same time the detector 18 detects the presence of the balancing beam 5 and the light 19 goes off, such that the light 21 remains off and therefore the solenoid valve 14 is not activated.
  • the auxiliary arm 4 reaches its pendular position while the detector 18 does not detect the presence of the balancing beam 5 , the detection light 20 of the auxiliary arm 4 lights up while the light 19 of the counterweight detector is still on. Simultaneous lighting of the two lights 19 and 20 makes the light 21 come on and automatically activates solenoid valve 14 that carries fluid through the line 13 into the balancing pipe 9 from the pump 11 . This automatic fluid supply restores the balance, that causes automatic deactivation of the solenoid valve 14 and the crane returns to the normal operating mode.
  • non-return valve 15 placed on the fluid supply line 13 between the solenoid valve 14 and the balancing pipe 9 prevents any accidental return of the balancing pressure.
  • a hydraulic valve 24 is located at one end of the balancing pipe 9 between a hydraulic valve 23 and the annular jack chamber 7 , and actuation of this hydraulic valve evacuates any excess fluid in the pipe 9 towards a reservoir 25 .
  • a hydraulic valve 26 allowing fluid to flow into the reservoir 25 is placed between the annular chamber of the jack 8 and the hydraulic valve 27 located on the pipe 9 .
  • FIG. 3 shows a manually controlled embodiment of the fluid inlet device according to the invention.
  • the same figures are used to denote the same elements as those belonging to the embodiments shown in FIGS. 1 and 2 .
  • This embodiment includes the fluid supply line 13 that supplies fluid to the balancing pipe 9 through the non-return valve 15 .
  • a hydraulic valve 28 is located on the line 13 on the inlet side of the non-return valve 15 , which provides manual control over fluid added into the balancing pipe 9 .
  • the operator observes a lack of synchronisation in the movements of the auxiliary arm 4 and the balancing beam 5 of the counterweight, such that the arm 4 reaches its extended stop while the balancing beam 5 has not reached its outer stops (which denotes excess fluid in the balancing pipe 9 ), he positions the jib of the crane in the high position and opens the valve 26 so as to allow excess fluid in the pipe 9 to be evacuated to the reservoir 25 until the balancing beam 5 reaches its outer stops by gravity.
  • the valve 26 also controls the balancing beam 5 dropping onto its stops.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US10/397,387 2002-03-28 2003-03-27 System and adding hydraulic fluid to the balancing line of a jib of a level luffing crane Expired - Lifetime US6860395B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0203879 2002-03-28
FR0203879A FR2837808B1 (fr) 2002-03-28 2002-03-28 Systeme d'apport d'huile dans la ligne d'equilibrage d'une fleche de grue a portee variable

Publications (2)

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US20030192849A1 US20030192849A1 (en) 2003-10-16
US6860395B2 true US6860395B2 (en) 2005-03-01

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US10/397,387 Expired - Lifetime US6860395B2 (en) 2002-03-28 2003-03-27 System and adding hydraulic fluid to the balancing line of a jib of a level luffing crane

Country Status (8)

Country Link
US (1) US6860395B2 (de)
EP (1) EP1348666B1 (de)
JP (1) JP3845069B2 (de)
AT (1) ATE355252T1 (de)
DE (1) DE60312067T2 (de)
DK (1) DK1348666T3 (de)
ES (1) ES2282581T3 (de)
FR (1) FR2837808B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2880337B1 (fr) * 2005-01-05 2007-04-06 Realisation D App De Manutenti Grue a fleche dont le bras auxiliaire peut etre maintenu vertical
CN101712441B (zh) * 2009-11-27 2012-03-14 齐齐哈尔轨道交通装备有限责任公司 起重机重铁定位装置及起重机
BRPI1001193A2 (pt) * 2010-02-11 2012-07-03 Vinicius De Carvalho Cal aperfeiçoamento em grua e processo de controle de contrapeso em uma grua, em tempo real
CN103407915B (zh) * 2013-08-28 2015-01-28 哈尔滨工业大学 一种水平转动式可移动配重机构
DE102017001533B4 (de) * 2017-02-15 2025-10-16 Liebherr-Werk Ehingen Gmbh Vorrichtung und Verfahren zur Ballastwiegung an einem Kran sowie ein entsprechender Kran
CN111350935B (zh) * 2020-04-17 2021-06-25 上海外高桥造船有限公司 一种门座式起重机变幅机构用保护系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1135807A (fr) 1955-08-08 1957-05-03 Perfectionnement aux appareils de levage
GB1110475A (en) 1965-12-17 1968-04-18 Beteiligungs & Patentverw Gmbh Counterbalanced boom
US4205308A (en) * 1977-11-21 1980-05-27 Fmc Corporation Programmable alarm system for marine loading arms
EP0033060A1 (de) 1979-10-11 1981-08-05 S.A. Sobemai Einrichtung zum Ausbalancieren von Kranteilen und der Last
US4773814A (en) * 1984-12-01 1988-09-27 J. C. Bamford Excavators Limited Earth moving machine
US4867321A (en) * 1982-11-26 1989-09-19 Societ',acu/3/ Montgon Systemes Variable reach crane jib with automatic balancing device
WO1998055289A1 (en) 1997-06-02 1998-12-10 Becfab Equipment Pty. Ltd. Press
US6102220A (en) * 1998-07-10 2000-08-15 Mannesmann Ag Crane jib
US6647718B2 (en) * 2001-10-04 2003-11-18 Husco International, Inc. Electronically controlled hydraulic system for lowering a boom in an emergency

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1135807A (fr) 1955-08-08 1957-05-03 Perfectionnement aux appareils de levage
GB1110475A (en) 1965-12-17 1968-04-18 Beteiligungs & Patentverw Gmbh Counterbalanced boom
US4205308A (en) * 1977-11-21 1980-05-27 Fmc Corporation Programmable alarm system for marine loading arms
EP0033060A1 (de) 1979-10-11 1981-08-05 S.A. Sobemai Einrichtung zum Ausbalancieren von Kranteilen und der Last
US4867321A (en) * 1982-11-26 1989-09-19 Societ',acu/3/ Montgon Systemes Variable reach crane jib with automatic balancing device
US4773814A (en) * 1984-12-01 1988-09-27 J. C. Bamford Excavators Limited Earth moving machine
WO1998055289A1 (en) 1997-06-02 1998-12-10 Becfab Equipment Pty. Ltd. Press
US6102220A (en) * 1998-07-10 2000-08-15 Mannesmann Ag Crane jib
US6647718B2 (en) * 2001-10-04 2003-11-18 Husco International, Inc. Electronically controlled hydraulic system for lowering a boom in an emergency

Also Published As

Publication number Publication date
FR2837808B1 (fr) 2004-10-29
DE60312067T2 (de) 2007-11-15
US20030192849A1 (en) 2003-10-16
EP1348666A1 (de) 2003-10-01
DK1348666T3 (da) 2007-07-02
JP3845069B2 (ja) 2006-11-15
FR2837808A1 (fr) 2003-10-03
JP2003292288A (ja) 2003-10-15
ES2282581T3 (es) 2007-10-16
EP1348666B1 (de) 2007-02-28
ATE355252T1 (de) 2006-03-15
DE60312067D1 (de) 2007-04-12

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